Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
hanh di » hanh de, hang di, danh di
tuc van » thuc van, truc van, tuc va
cuu tre » cua tre, cau tren, cau treo
nong va » nong van, dong va, cong va
tu nong » tu dong, tu cong, tu tong
va cam » va cham, va cao, va cai
va hoi » xa hoi, va hoc, va hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nong va hoi. hieu ((va cam) or (va cac)) tuc van ((hanh di) or (hanh vi)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nong va hoi. hieu ((va cam) OR (va cac)) tuc van ((hanh di) OR (hanh vi)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu nong va hoi. hieu ((va cam) or (va cac)) tuc van ((hanh di) or (hanh vi)) cuu tre*.